Proclivity is leading in Top 100K Sites and Top 1M Sites.
Questback has better usage coverage in more websites categories. Including People & Society, Business & Industry, Arts & Entertainment, Internet & Telecom and 64 other categories.
Proclivity is leading in Sports, Health, Football, Medicine and 15 other categories.
Questback is leading in most countries, including Sweden, Norway, Denmark, Great Britain and 51 other countries.
Proclivity is leading in United States, Ukraine, Peru and China.